Do you have a pair of shoes that aren't worn out, but are just too smelly to wear? You could…
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If you're out of baking soda, or simply don't want to waste a package each month on keeping your fridge smelling fresh, a bowl of kitty litter will do the trick just as well. It also works wonders on diaper pails, musty old books, and even a smelly car. You can dump kitty litter pretty much anywhere that stinks and just toss it out (or vacuum it up, if necessary) once it absorbs the smell. Just don't keep it around too long because it can become damp and gross. In the case of the garbage can, changing it weekly is best. In the fridge, you can go about a month just like you would with baking soda.